lucy is a good student.改成否定句,疑问句并回答yes/no好点

lucy is a good student.改成否定句,疑问句并回答yes/no
好点

Lucy isn't a good student.
Is Lucy a good student?
Yes,she is No,she isn't

否定：Lucy is not a good student.
疑问：Is lucy a good student? Yes she is. / No she is not~
is not 在书面里最好这样分开写
口语的时候再说isn't

Lucy isn't a good student.
Is Lucy a good student?
Yes,she is No,she isn't

Lucy isn't a good student.
Is Lucy a good student?
Yes,she is
No,she isn't
纯纯的原创~~